Electric dry shaver



June 3, 1941. l. FLORMAN 2,244,452

ELECTRIC DRY SHAVER Filed July 15, 1938 2 Sheets-Sheet 1 June 3, 1941. 1. FLORMAN ELECTRIC DRY SHAVER Filed July 15, 1938 2 Sheets-Sheet 2 M W 0 2 H a W V m Patented June 3, 1941 UNITED STATES PATE NT OFFICE EIEC'I'BIO'DB! SHAVER Irving Fiorman, New York, N. Y. Application July 15. 1938, Serial No. 219,477 Claims. (Cl. 30-43) vide such members which are possessed of such,

strength, due to their design, as to obviate the necessity for the provision of expensive reenforcements therein.

It is a further object of this invention to pro-, vide such a device wherein the cutter head is provided with a snap-on connection. with the frame or casing in such manner as to be removable with ease therefrom.

It is a further object of this invention to provide in such a device means disposed substantially wholly within the frame or handle formed by the members for aligning the members to form an enclosure, while, at the same time, providing a snap-on connection between the cutter head and the frame or casing.

It is a further object of this invention to provide such a device which includes a casing having therein a motor with a drive shaft, which casing has removably secured thereto a cutter head, in which cutter head, cooperating therewith, is a rotatable cutter or cutting blade which is secured to a cutter support member which is easily removable from and slidably secured to the motor drive shaft and resiliently urged in such direction as resiliently to maintain the cutter blade closely adjacent the cutter head. It is a further object of this invention to provide such a device which is of strong but cheap construction and wherein the parts and elements are so arranged as to achieve the utmost compactness for convenience in use, and for most nearly conforming to the hand of the user.

Further objects and advantages of the invention will appear more fully from the following description, particularly when taken in conjunction with the accompanying drawings which form a part thereof.

In the drawings:

Fig. 1 is an exploded view of a dry shaver incorporating the principles of this invention wherein one of the frame or handle members is omitted and wherein some of the parts are shown in perspective and others in elevation;

Fig. 2 is a view in elevation of a frame'or handle member as seen from the inner side thereof;

Fig. 3 is a perspective view of the cutter support member and attached cutter shown in Fig. 1;

Fig. 4 is a topplan view of the assembled dry shaver device with the cutter head removed;

Fig. 5 is a fragmentary detail, in section, 11-

lustrating the manner in which the motor frame and handle members are secured together:

Fig. 6 is a view in side elevation of the assembled dry'shaver devicey Fig. 'l is a view similar to Fig. 4 but showing a device with the cutter head attached thereto. which cutter head is partially broken away in the interest of cleamess of disclosure;

Fig. 8 is a bottom plan view of-the assembled dry shaver device;

Fig. 9 is a view in section of the cutter head of the device:

Fig. 10 is an enlarged view in perspective of the resilient thrust means illustrated in Fig. 1: and

Fig. 11 is a fragmentary view partly In section illustrative of the cooperation of the means illustrated in Fig. 10 with the cutter supporting means. the cutter, the cutter head and. motor drive shaft.

The motive means of the invention comprises essentially an electric motor I having an. attached plug base 2, which motor is provided with a drive shaft 4 .having the upper end thereof provided with a flat portion 5.

Disposed about the upper end of the drive shaft 4 is a resilient thrust means 6 in the form of a resilient spring washer which is disposed intermediate a step portion 4b of" the driving shaft 4 adjacent the flat portion 5 and the cutter support member I which has the cutter or cutting blade 8 rigidly secured thereto. The motor I and plug base 2 are disposed within an enclosure formedby a pair of identical and complementary frame or handle members 9 to which, when assembled, is removably secured the cutter head III as shown in Figs. 6 and 7. These members 9 may be formed of any suitable, electrical insulating material, such as molded plastic, Bakelite, or the like.

The motor I may be of any suitable type and has the frame thereof provided with bores or apertures I I through which are adapted to extend suitable means, hereinafter more clearly described, for securing the frameof the motor I to the handle members 9. The plug base 2 is of rectangular form and of suitable dimensions -=for disposition within supporting grooves provided in the handle members 9, as will also be hereinafter more clearly described, and is provided with prongs I2. I

The details of the frame or handle members 9 are most clearly illustrated in Figs. 1 and 2,

wherein it will be seen that these members 9, which are identical, are provided with hollow intermediate portions Il which are bounded laterally by flanges or walls I5 and at the bottom by a solid portion forming an interior wall I having a channel I I extending therethrough. Undercut grooves I8 are provided in the walls of the channel I1 and are of such dimensions as to receive one half of the plug base 2, in such manher that when the members I are secured together the plug base will have the margins thereof completely supported in the complementary. undercut grooves II. Theplug base 2 isthus secured in the undercut grooves II between the connected in the frame of motor ,I forreception of the above-mentioned and hereinafter described connector means. Above the central hollow portion I4 each handle member 8 is provided with'an inwardly thickened strengthening boss 22 which has therein a suitably disposed aperture 23 of Is, each of which has frame or handle members 0. as shown in Fig. 6.

Due to the resiliency of thesemi-annular spring member ll the cutter head ll may be detached substantially rectangular section which provides for extension of the starting wheel 44 (Fig. 1) of the drive shaft 4 to the exterior of the frame or handle formed by the complementary members 8. a

At its upper end each member 0 terminates in a semi-circular wall 24 which is provided with a semi-circular aperture 24!: for extension of the drive shaft 4 from the interior to the exterior of the enclosure formed by the members 9. Immediately adjacent the wall 24 is the exterior semi-annular wall 25 which terminates at its lower end in the step 2 which is adapted for abutment with .the lower end of thecutter head Iii as shown in Fig. 6. Above the boss 22 and below the wall 24 is the interior semi-annular groove or channel 21, which is adapted to receive the connector member 3! (Fig. 1) as shown in Fig. 7. Each wall 25 has a semi-circular notch 28 therein as shown in Figs. 1 and 2.

The semi-annular connector spring 30 is' provided at each end with an outwardly directed pin member SI, each of which is adapted to fit within the annular aperture provided by the two notches 28 as shown in Fig. 7.

Details of the cutter head are illustrated in 9, wherein it will be seen to comprise an annular portion 32, the lower margin or edge of which 32 is adapted for close engagement with the above-described semi-annular steps 26 as shown in Fig. 6. At its upper end the annular portion 32 is provided with an inner marginal step 34 in which is rigidly secured in any suitable manner the flexible plate member 35 which is suitably provided with perforations or apertures of any desiredv type such as those illustrated in Fig. '7 which are substantially of key hole form. This plate is, of course, adapted for engagement with the face of a user and the flexibility thereof permits of close confirmation of the plate to the surface of the user's face.

The annular portion 32 of the cutter head III is provided with diametrically opposed apertures 36 having reenforcing tubular liners 38 therein as shown in Fig. 9. These liners closely engage the pin members 3| as shown in, Fig. 7 when the pin members are extended therethrough as from the frameor handle by being pulled upwardiy therefrom. It will, thus, be seen that due to the provision of the connector member,

formed by the semi-annular spring member II and supported by the pins 3| in cooperation with the groove or channel 21 and the notches 28,

snap lock attachment of the cutter head II to the handle or casing is provided. Also, these 1 members I, which form the casing, are maintained in alignment with'one another by engagement of pins 3| and notches 28 and are retained together by extension of the annular portion 32 and the cutter head ll over the semiannular side walls 25 of the members Q.

Additional means for securing the frame or handle members 9 together with the motor I supported therein in proper position is provided as above explained, and this means, which is shown in Fig. 5, comprises a pair of tubular connector members 4l, which are internally threaded at each end for reception of a. screw 4I. These tubular connector members 4| each extend through a pair of apertures 2I and an aligned aperture II, as shown in Fig. 5, and the frame of motor I is resiliently supported with respect to the adjacent boss I! by means of resilient washer members 42 disposed at opposite sides of the frame of motor I and between the side of the frame and the adjacent boss II. These connector members 4|, thus, provide means for connecting together the identical frame or handle members 8 in such manner that removal of the cutter head II from the casing formed thereby will not aflect the relationship of these members.

However, if the shaver is dropped and one or both of the frame or handle members I is cracked or broken, the screws 4| may be unscrewed from the tubular connector members 40 and one or both of the frame or handle members 8 may be removed and replaced by another member! obtained from a dealer having them in stock. Due to the identical construction of the members I, there are no "rights" and "lefts" and any member 0 will obviously nt any other member I, which permits of repairs being made by a user and obviates the necessity for shipping a shaver having a broken handle member to the factory or branch distributor for repairs. The details of the cutter support I are shown in Fig. 3, wherein it will be noted that this cutter support member has a cylindrical bore 43 which terminates in an end wall 44, which end wall is provided with a threaded aperture 45 for receiving a cutter connecting screw 4. The cutter connecting screw 4 extends through a suitable aperture provided in the cutter blade I for rigidly securing the cutter blade 8 to the cutter supportmember I. The cutter support member I is also provided with a radial screw threaded aperture 41 which receives a screw. The screw 4| cooperates with the flat portion 5 of the drive shaft 4 of the motor to prevent relative rotation therebetween while permitting free axial sliding movement therebetween.

The cooperation of the cutter support I with the flattened portion I of the drive shaft 4 and the resilient thrust means 6 is illustrated in Fig. 11, wherein it will be seen that the resilient thrust member 8, which is shown in the form of a resilient split washer. encircles the drive shaft 4 and has one end thereof in engagement with the lower annular surface of the cutter support I and the opposite end in engagement with the flange or boss lb of the drive shaft 4 in such manner that the cutter support I is constantly resiliently urged outwardly with respect to the boss 4b and the motor I toward close engagement with the lower or inner surface of the plate member 35 of cutter head [0.

Due to the fact that the boss or flange 4b and the cutter support 1 have no relative rotary motion, no friction is caused by the interposition therebetween of the resilient split washer member 6 as will be clearly understood. It will, likewise, be understood that the cutter support memher I and attached blade 8 are freely removable from the motor drive shaft for facilitating remove] and renewal of the cutter member 8 or for substitution for the unit comprising members I and 8 of another like unit.

It will, thus, be seen that the utmost flexibility is achieved in renewal or replacement of the frame or handle members 9 which are identical, in removal and replacement of cutter heads III for enabling a mer to substitute for one cutter head having apertures of a given coarseness a cutter head having apertures of different size,

in removal and replacement of cutter blades Ii when worn or dull and in assembling and disassembling the shaver for repairs or adjustment. It will, likewise, be seen that the extremely compact arrangement of the parts within the casing or handle formed by the identical complementary members 9 permits of making the shaver of extremely small size for convenience in use. while in no wise reducing the strength of the motor i.

It will, likewise, be seen that in addition to the ease of removal and replacement of the identical complementary frame or handle members 9, these members are possessed of substantial and sufiicient strength, while, at the same time, being of cheap construction due to the obviation of necesity for provision of metal reenforcements therein.

While it is, of course. to be understood that apertures or perforations of varying shapes and dimensions may be provided in the plate member 35 of the cutter head "I for adapting the shaver to beards of different types, a preferred form of apertures is illustrated in Fig. 7, each of which comprises a circular perforation or aperture having a slot extending substantially radially therefrom. It is, likewise, to be understood that the dimensions and arrangement of these substantially key-hole shaped apertures may be varied 90th as to denseness and as to relative position with respect to one another.

It is, of course. to be understood that the above lescribed structure is merely illustrative of the ipplication of the principles of my invention and hat I intend to comprehend such variations and modifications as are embraced within the scope f the following claims and the invention.

Having thus fully described my invention, what claim as new and desire to secure by Letters atent is:

1. In a dry shaver device, a pair of interchangeble frame members engageable to form a motor nclosing handle, a cutter head telescopically-enageable with adjacent end portions of said frame lembers, and means enclosed in said adjacent end portiom providing snap-lock connection between said cutter head and the handle formed by said frame members.

2. In a dry shaver device, a pair of interchangeable frame members engageable to form a motor enclosing handle, internal groove means in said frame members at one end thereof, complementary notch means in said frame members engageable to form aperture means communicating with said internal groove means, arcuate spring means in said internal groove means, and pin means resiliently supported by said spring means for projection through the aperture means formed by said notch means to maintain said frame members in alignment.

3. In a dry shaver device, a pair of interchangeable frame members engageable to form a motor enclosing handle, internal groove means in said frame members at one end thereof, complementary notch means in said frame members engageable to form aperture means communicating with said internal groove means, arcuate spring means in said internal groove means, pin means resiliently supported by said spring means for projection through the aperture means formed by said notch means to maintain said frame members in alignment, and cutter head means including an annular portion telescopically engageable with the exterior portions of said frame members adjacent said internal groove means for retaining said frame members in engagement, said annular portion having therein aperture means engageable with said pin means for providing snap-lock connection between said cutter head means and said engaged frame members 4. In a dry shaver device, in combination, a pair of complementary en ageable handle members having recesses at one end forming an annular intemal groove, means in at least one handle member forming an aperture communicating with said groove, a cutter head having a portion engageable with the exterior of said handle members adjacent said groove and an aperture therein adapted for alignment with said first named aperture, an arcuate resilient pin supporting member in said recess, and pin means yieldably supported by said pin supporting member for en agement with said apertures to provide snap-lock connection between said cutter head and the handle formed by said handle members.

5. In a dry shaver device, a rotatable drive shaft, a cutter head spaced axially therefrom adjacent an end thereof, a flat portion on saidv shaft adjacent the end thereof, a shoulder on said shaft adjacent said fiat portion, rotatable cutter means cooperating with said cutter head, a cutter support member supporting said cutter means and rigidly secured thereto, said cutter support member having a bore engaging said drive shaft. screw means extending radially into said bore for cooperating with said flat portion of said shaft to secure said cutter support member axially, slidably and non-rotatably to said drive shaft, and a resilient spring washer member disposed about said drive shaft between said shoulder and said cutter support member and in abutment therewith for resiliently maintaining said cutter means closely adjacent said cutter head.

IRVING FIDRMAN. 

